AD5142ABRUZ100-RL7

Overview

The AD5142ABRUZ100-RL7 is a dual-channel, nonvolatile digital potentiometer featuring 256 tap positions and an I2C interface. It offers a nominal resistance of 100 kΩ with ±8% tolerance and a temperature coefficient of 35 ppm/°C. The device supports single or dual supply operation (VDD: 2.3 V to 5.5 V) with an independent logic supply (VLOGIC: 1.8 V to 5.5 V). Key electrical parameters include a maximum wiper current of ±1.5 mA for the 100 kΩ variant, a bandwidth of 0.43 MHz at 100 kΩ, and low power consumption with typical operating currents in the microampere range.

Feature Summary

• Dual-channel architecture with 256-position resolution and nonvolatile EEPROM storage for wiper settings.
• I2C-compatible serial interface supporting standard (100 kHz) and fast (400 kHz) modes.
• Linear gain setting mode via INDEP pin for precise resistor matching between channels.
• Wide operating temperature range from −40°C to +125°C.

Applications

• Portable electronics level adjustment
• LCD panel brightness and contrast controls
• Programmable filters, delays, and time constants

Procurement Notes

Verify the specific ordering suffix RL7 against manufacturer documentation to confirm reel packaging specifications. Confirm that the RUZ package designation corresponds to the TSSOP-16 form factor required for the target PCB footprint. Ensure compatibility with the system's I2C bus voltage levels given the independent logic supply capability.

Selection Notes

Select this component when dual-channel adjustment with persistent memory is required. The 100 kΩ resistance value suits applications needing higher impedance than the 10 kΩ option. Verify that the 0.43 MHz bandwidth at 100 kΩ meets the signal frequency requirements, as higher frequencies may require the 10 kΩ variant for increased bandwidth.

Part Context

This part belongs to the AD5142A family, which provides dual-channel, 256-position nonvolatile digital potentiometers. It shares core specifications with the SPI-based AD5142 but utilizes an I2C interface. The 'B' indicates automotive qualification, while 'RUZ' denotes the TSSOP-16 package.

Replacement Considerations

The AD5142BRUZ100-RL7 is a functional substitute within the same family, differing primarily in the absence of the automotive qualification suffix. Both share identical electrical characteristics, interface protocols, and pinouts.